Roller guide means



Jan. 19, 1954 Filed Nov. 13, 1950 W. STAHLECKER ROLLER GUIDE MEANS 2Sheets-Sheefl .lnkenfo n" WW gmm Jan. 19, 1954 w. STAHLECKER ROLLERGUIDE MEANS 2 Sheets-Sheet 2 Filed Nov. 13, 1950 Inventor-.- WM

"2 Whiz/LEM v.

Patented Jan. 19, 1954 UNITED STA ES 91F "R ER wee "M ANS ,w helm si ahnqket fi meGexmnm aesigner to Vereinigte.Kugell l erfabrikenAktien-"gjesllsehaft,'Sehweinfurt;Gefxhaiiiy" Application November 13, 1950,Serial-No. 195,192

l' ClaimS.

1M5 znresent invention relates to a guide arm 191' 115116 upperxollerspf ;a textile :fiber drawing m ehanism. I V

@ne ofztneiobjects of myj present inventionis to prov d a guideam ;forth upper:r011ers vof dnawingime hanismzwhiqh will automatically ali n:the :axisof :the u nerzmllers with those of ,th ilowenrollers.

.-.asiditiqnal ohiect iQ my present inve tion is to provide a guide armwhich will automatically nompepsatezfqrithe inevitable inaeuztaciesinlthe nonstltuntion, ofithe, guideairmn herzobiectpf anypresent inventi n is to mm- ,e aui warm'wh ll may b e sily rei herollers asso iated-therewith.

:lflfitflhifil herro i o qfzmy pres n inte tion is :to :p qvid a guidarm which will hav .ionly elimited play n a :to mainta n the vali nnpperzrollelz -withtk e l w ro venti'on mainly v cnllsist o :a device"for guidin the npper rollerseofma textn fi erdraw n me anism {in whichthe upper -vr c; 11er s -are arranged ainsLa-eoxnpr' mg, i nec m n i n,a iguid arm 'navin eat least a :ifi'lfst rsectiq an 1 s co d s tion.antaneeu ubstantial y. al n astrai' ht line with an ends q qn of thvfirst ;-s 0 ocat adj? em gtovazsigleg-portion of the-second. section,

port on v, pf :vhde see d-se t on, emean Q n c g the ith the iaihev objcts in Vi w, my pr s n intstseetlq wi h theside port on en de ram 11theu nen iQl el th t th iu p r a. e. y l tate with respect to the gu icle aim th .-fi em i name tw sep t si er e edir mi id arr n d i e aralel li Q h LePK S m m o n tin t of sidear siwhichare clistantirom Iteeneqie i lzq @ih "fi st se tiq an $1,110 In. ele rne nt gnounted on thedrawing mechand located in abuttin enga ement with e a fi-ifllfi m t tosslsrnembei and the sideQarms connected -;t ;li e'to' cooperate withthe fulcrum' element: in t e a.n j erw Ora ndulum s e o automatically 1cigeps ter rg if en nees .in thelen ths of the sidarms.

21 tim l eature which a n i re es tic or ti e inyention azge set iorthin he appendedelaims. "The invenld iee t a d l-e nta h e i i b under tod f om ,the i l wine deser ption "fifilsmb tl j emswhen ifial 1m l piM11211 th ee meem s re ifi lin M 1 99 weve lji thias toits prisp nep odof operation, together with'adqi- Big. 31 is an elexational View, partlyin section, of ia u de armaceording o a present dayknow cons r tion;

1*' ig. 1a is a partialieleyational viewpf the-strum- ;tureshpwn in Fig.llrwith thelefthand rollers of Fig. 1 in a difierent position from thatshown m :F

Fie- 2:, 1ap a ieW, pa l in section, o -the uq .u :e sh wn iHiEjfi-th Ri-33 is sane eVa QnaI review, ,p tl in eq n, of a guid -a c ns ctedin-accordan e with y prese t inv nt on;

:Ei A is e v i w pa tl in enti n, of the structure shown in Fig. V

Fig; 5 is an end elevational gview f the struc: t e h wn in Fie a eyiewed zfr m the -rieh {hand n g h r of;

,6 "it .an-fi vational view, =part1 in se ion, of another embodiment ofa guide v :arm constructed ;in; aqc 0rdanee with *my presen inv ntion;

;Fig. 7 is ,a plan iew, partly in section, of the structureshown in, Fig. 6

Fig. 8 .i s an elevational view taken along line of Fig 6,,and lookingin the direction ..of th e rmvfzs:

,-Fig.;, 9 is an elevationalzfliew, partly in section, o asti fuheriemhq im n f id m .1. structed in ,aocordanqe with ,my presentinvention;

fie. is .a sect ona .vi a en alon ine of Fig. 9 and looking in thedirectionpf the arrows; and

-=Eiehi @3 3 iewp s r c rele h wn ea f i h h nd end-.Q e--;

"Gu de gene o I t pe t which my prese ion'-relates, a1;e shown in U. 38.PatentNo. 2,245,514. finch- 3 guiqegai misillustrated inFigs. nd en reres nt jn nst l Qfi dQ-aniis- I :In; eknewn-cpnstm tion s ownni en Z,;tl1e:upper rollers shown in the leftportion-of tact therewith. Mounted ona through rod 15 are the guide arm support members 6 which areadjustably connected to the through rod 15 by means of the bolt H whichclamps together the spaced portions of the supporting member shown atthe right hand end of Fig. 1. Mounted in the recess l8 in element 6 isthe pin 4 to which is connected the guide arm section 2.

It will be noted that this guide arm section 2 is formed of a singlepiece of metal which is bent centrally thereof to form two separate sidearm portions on this section of the guide arm, the free ends of theseside arms being bent so as to form the bearing joint portions 3a and319;

Section i of the guide arm shown in Figs. 1 and 2 is connected to thesaddle members 59 and 20 by means of the bolts 2| and 22, respectively.Saddle member 26 has a pair of recesses which receive the end portions311 and 31) therein so that section l of the guide arm is therebyconnected to section 2 of the guide arm. Fixedly connected to saddle I9is the hook 23 to which a weight is connected for loading the upperrollers shown at the left hand side of Fig. 1. Element 212- is a guidemember for a clearer roller to be mounted above the upper roller 3.

It is evident that, in a guide arm of the type shown in Figs. 1 and 2where guide arm section 2 is manufactured from one piece of metal, it ishardly possible to accurately construct the guide arm section 2 so thatboth of the bearing elements 3a and 3b are equally distant from thepivot 4 and symmetrically located with respect to a ver tical planepassing perpendicularly through the lower rollers and through the pivotpoint 4. Only when these requirements are fulfilled, and also in certainexceptional cases, can the guide arm section 2 be accurately alignedwith guide arm section 1 and the guide arm section I be in bearingengagement with both portions 3a and 31).

Because the upper and lower rollers are not truly circular and becausewindings form von the rollers, the guide arm section will necessarilymake linear and lateral movements which must be limited, for variousreasons, by the guide arm section 2. Because of theunsymmetrical-position of the bearing joints 3a and 3b, there is atendency for a lateral movement of the section I which is much greaterthan its limits permit. The result is that guide arm section I rubsagainst guidearm section 2 and the position of the upper rollers inparallel relation to the lower rollers does not obtain. I

- A further result is that only one of the bearing elements 3a and 3b isin engagement with guide arm section I so that a lateral turning ofguide arm section 2 occurs which causes the central portion of the upperrollers Ta and 8 to be moved out of the vertical plane passingperpendicularly through the lower rollers and through the pivot 4.

My present invention overcomes these defects principally by means of atwo section guide arm. The sections of the guide arm are connectedtogether in such a way that they are free to move with respect to eachother and so that the unavoidable differences in the dimensions of thesides of the guide arm section 2 are automatically compensated for.

One embodiment of my present invention for overcoming the abovementioned defects in known guide arms, is shown in Figs. 3 and where themember corresponding toguide arm section 2 of Figs. 1 and 2 is no longermade of a single piece of metal. As is shown in Fig. 4, two separatearms 2a and 2b are connected at their 4 ends to a cross member 20. Thecross member 20 has reduced end portions which pass through aperturesformed in the ends of the elements of 2a and 212, respectively, so thatthe arms 2a and 2b are freely mounted with respect to cross member 20.The connection of elements 2a, and 2b to guide arm section ia by meansof the bearing joint portions 30 and 3d, respectively, is the same asthat described in connection with Figs. 1 and 2.

In the form of my present invention which is illustrated in Figs. 3 to5, the guide arm support Ea comprises a pair of longitudinal sideportions 25 and 21 anda'pair of grooves 23 and is formed at the lowerinner sections of these side portions. Between the side portions 26 and21 is mounted a block 32 having a pair of projections 30 and 3| locatedin the grooves 28 and 29, respectively. The block 32 has a portionthereof cut away so as to permit cross member 20 to extend across theblock 32. Threadedl mounted through a substantially vertical threadedopening in block member 32 is the fulcrum element 'ia against whichcross member 20 bears. The position of the upper rollers may be adjustedby moving block 32 along support member 6a, and block 32 may be fixed inany desired position by turning screw do so that the projections 35 and3| bear against the upper surfaces of grooves 23 and 29, respectively.Roving guide member 33 is shown in Fig. 3.

It will be noted that, due to the arrangement of guide arm section 2a,2b, 20 shown in Figs. 3 to 5, the arms 2a and 2b and the cross member 20connected thereto may move about fulcrum element 4a in the nature of apendulum so that bearing portions 30 and 3d are always in contact withguide arm section la. If arm 2a, for example, is'moved in one direction,arm 2b necessarily moves in the opposite direction, and in this mannerany differences in the dimensions of the arms 2a and 2b areautomatically compensated.

The guide arm sections la and 2a, 2b, 2c are therefore constantly inalignment with each other, and all of the necessary movements of theentire guide arm are freely permitted. In order to guarantee a quickautomatic parallel alignment of the axes of the upper rollers with thoseof the lower rollers, the lateral movements of guide arm section la withrespect to guide arm section 2a, 2b, 2c are narrowly limited, as well asthe lateral movements of guide arm section 2a, 2b, 2c. The lateralmovement of guide arm section Ia with respect to guide arm section 2a,2b, 2c is limited by the location of guide arm section la betweenelements 2a and 2b, as shown in Fig. l, and by the minimum of side playpermitted between the bearing portions 30 and 3d and the recesses in thesaddle element 20a shown in Fig. 4. The lateral movement of elements 211and 2b is limited by the small clearance which is provided between theseelements and the inner surface of side portions 26 and 21 of the supportmember is. A narrow limiting of these lateral movements permits theentire guide arm and the upper rollers connected thereto to beconveniently and eifectively controlled.

Figs. 6 to 8 show another embodiment of a construction for carrying outmy present invention. In this embodiment the guide arm section is formedof two separate arms 21 and 29. However, at the left hand end of thesearms, as viewed in Figs. 6 and 7, the bearing portions have beenreplaced by hook-shaped end portions 2d formed integrally with side arms2) and 29. Instead of a cross member similar to 20, shown acet c-sit inFigs-2eam d-the eon e'cting'er ss mmtefze shown iii-Fig; 7' comprisesanaperture" eiteiiding' theretorodgh perpendicularly to arms 2 f and 2gand" having annular rojection" 34" located therein; V 'rhrougli theaperture in element 2e and in engagement" with projectioz'i flds'located the fiil'-' gram member" 35 which is supported withinslotfs 36;passin through the side portions 26c and floor 'pport 6b. Thisfulcrum-member ably" connected by means of a thread thereonand' the nut31 at any position along theslots 35 so as to thereby adiu'sttheositions of the epreee re11ersene -topm ee1e toners; It you be" noted"that the hoolreshaped pertior'is 2d engage the shaft 1 ofupper roller idso that" there is providedbetween guide a'ri'n'sectib'"ameXtremelys-trong, simple and rigid con nection' wherein theshaft 1 itself forms-a pivot between the sections: Due to-this-typeofl'c'on netion it is only necessary to raise guide arm section" lc' androller 8 in order to correct any trouble which may have occurred duringthe op eration of the machine; and the roller Ta will remain in theposition shown in- Fig. 6. It will not' -move fromthis position asit'doeswith' the fOrmof-g'uide arm shown in Figs. 1 and-2. This movementof roller 1a is illustrated in Fig; l a and particularly harmful in adouble apron" draw ingsys'tein V In order toe'lirhinate, asmuchas'possible, playbetween guide arm'sections', there is provided a pin38'' on'which-is mounted the spring H! which pressesthe armsz-aend 2boutwardly against'the inner surfaces of the depending portions ofsaddle" member 261); as isclearly shown in Figs. 7 9111658:

one advantage cfthe' construction shown in Figs: 6 -to 8- isthat'theg'uide arm-section- 2f,-2g' may be turned-us to thedOttedlineposition illusti'a-ted in Fig. 6, after guide armsection 27,2o lia s -been disconnected from shaft 1; so as to give access to therollers located beneath'guide arm section -2f, 2g.

The-construction shown in Figs. 6 to 8 permits guide arm se tion: [c tobe separated'from; guide ar section 21, 2g simply by moving the shaft '1out or thehook-shaped portions 211, so that guide arm" section 2f,- zgmathen be turned up to the dottedline position shown in Fig. 6. Guide armsection 292-. 2g or its support member 6b may be constructed in anyknown manner so that the guide-arm section 2- ,2'9 will remain in thedotted line position shown in Fig. 6. In'contrast to this, the guide armsections l and 2 shown in Figs. 1 and 2'- cannot be'easily separatedfrom each other and can only be moved up to a limited degree, asis:evident from Fig. 1a.

While the spring l0 eliminates undesirable play between the guide armsections, the force of the spring is small enough to provide only aslight frictionbetweensaddle member 2% and ends 2 d of: guide armsection 2 2g, so that guide arm sec ti'on" to maybe easily turned withrespectto guide arm 'section 2'7; 2g. The construction shown in Figs. 6to 8 therefor provides the desired'ali'gn mefitthe guide arm" section,as described above. '1 ad tion to the lateral movement of-arms an d2g,in' F-igs. sand-'7, beinglimited by side portiQhsQEa'and 21a;asdescribed above, this lateral movement is further limited to the spacebetween the pin and the aperture extending thrbugh' cross merr'rber ze;I v} Figs. Qto l l-show alfur'th'er 'embodiment ofm'y present-inventionin which the'three upper rollers 1 abutt'ihg engagement with ahnularprojectiong. are air saddle waded, In this form of themve'l'lfifill';the rearguide arm section again eludes the arms 2h'and'2isimi1arto thoseshown in Figs. sand 7 and-which area-Isa pressed-by spring l'llaagainstthe inner surfaces of depend ingportions of the saddle member 39"which is constructed diifere'ntly rrom'saddiemember 20b"; connecting theright hand end" portions" or arms 2h" and 2;,- asviewed in- Figs; 9 and11, is the cross-mem er 2 having the annular projection- 4'0' thereon;The fulcrum member of this" em bodiriient comprises an extension 41 ofsupport member" 6' which has a substantial: planar-sur face-locatedadjacent to cross member 2a and ti" The pendulum-like movement of guidea sectiofi 2h,- Zi, Shown in Figs. 9 and 11, is lirfii 1 by" contactbetween the outer surface of cross member ti with the adjacentsurfacevof fulcru'i'ri element} 41 I't'is evident that the guidearmsection showni-n Figs; Qa-ri'd 1 1 possesses al l o the dirnerisioncompensating endear-enema tur es' which are-possessedby the guide arm strons described above" in connection with-the em bodiinents of theinvention shown'i'n" Fi'gst S am 6- respectively; p Saddle member 39itself forms a part or the forward guidearm section and" is connectedto" arm lo any suitable manner, e2: b a strod ture shown'in dotted linesin Fig. 9 consi's ng abifurcated element to and? a cross 1 member 51*. ihe bifurcated element is-form'e'dwith an" open ing passing transverselytherethrough and the elongated arm- Io extends through this opening. Athreaded opening extends through arportioii of the bifurcated elementwhich overlies the arrfr lb, and aset screw 52 is threadedly' mounted inthis last mentioned opening; so as-to rigidly cone nect the bifurcatedelement to the'arm lb; The bifurcations of the bifurcated element 50 aremounted on opposite sides of the cross member 5! whichextends across thespace between the dependingsi-de portions of saddle member 39: In orderto have the bifurcated element 50- fit 39 clearances are provided onboth sides between the saddle member and said element.

7 By means of this aforementioned structure the arm lb may be fixed inposition with-respect to the saddle member 39 by tightening the setscrew while upon looseningthe set screw the arm lb can easily beadjusted or removed. Member 39 is formed with an opening (not' shown)over the screw 52 so that the latter is easily reached.

The rod 42' for supporting the Weight which loads the upper rollers ofFig. 9 is seated ina notch provided in the upper part of'ar'm I151,there being a number of notches provided for adjustment of rod 42. Thenotches are not shown in the figure.

Counterclockwise rotation of eie'ment as about shaft 7 is limited bymeans of extensions" I2 which are formed integrally with the dependingportions of saddle 3'9 and which engage step member ll 'formed onarmslzh and 21'. When the load has been removed from element and whenarm lb has been disconnected from member 39, this member 39 may beturned to the dotted line position shownin Fig. s te give access to thelower rollers;

It will be understood that each of the elements described above, or twoor'more together; may also find a useful application in other types'ofroller guide means differing from" the'types do: scribed above.

While I have illustrated and described the invention as embodied inguide means for upper rollers in a, textile drawing machine, I do notintend to be limited to the details shown, since various modificationsand structural changes may be made without departing in any way from thespirit of my invention,

Without further analysis, the foregoing will so fully reveal the gist ofmy inventionthat others can by applying current knowledge readily adaptit for various applications without omitting features that, from thestandpoint of prior art, fairly constitute essential characteristics ofthe generic or specific aspects of this invention and, therefore, suchadaptations should and are intended to be comprehended within themeaning and range of equivalence of the following claims.

What I claim as new and desire to secure by Letters Patent is:

1. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upper rollers are arranged in pairs, comprising,in combination, a guide arm having at least a first section and a secondsection arranged substantially along a straight line with an end portionof said first section located adjacent to a side portion of said secondsection; joint means for articulativel connecting said nd portion ofsaid first section with said side portion of said second section; meansfor connecting said guide arm to the upper rollers so that the upperrollers are free to rotate with respect to said guide arm; said firstsection having two separate side arms spaced from and arranged inparallel relation to each other; a cross member connecting the ends ofsaid side arms which 'are distant from said connected end of said firstsection; and a fulcrum element mounted on said drawing mechanism andlocated in abutting engagement with a central portion of said crossmember, whereby said cross member and said side arms connected theretocooperate with said fulcrum element in the manner of a pendulum so as toautomatically compensate for diirerences in the lengths of said sidearms.

2. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upper rollers are arranged in pairs, comprising,in combination, a guide arm having at least a first section and a secondsection arranged substantially along a straight line with an end portionof said first section located adjacent to a side portion of said secondsection; joint means for articulatively connecting said end portion ofsaid first section with said side portion of said second section; meansfor connecting said guide arm to the upper rollers so that the upperrollers are free to rotate with respect to said guide arm; said firstsection having two separate side arms spaced from and arranged inparallel relation to each other, each of said side arms being arrangedin substantially parallel relation to a vertical plane passingperpendicularly through the lower rollers of the drawing mechanism; across member connecting the ends of said side arms which are distantfrom said connected end of said first section; and a fulcrum elementmounted on said drawing mechanism and located in abutting engagementwith a central portion of said cross member, whereby said cross memberand said side arms connected thereto cooperate with said fulcrum elementin the manner of a pendulum so as to automatically com-v pensate fordifferences in the lengths of said side arms.

3. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upper rollers are arranged in pairs, comprising,in combination, a guide arm having at least a first section and a secondsection arranged substantially along a straight line with an end portionof said first section located adjacent to a side portion of said secondsection; joint means for articulatively connecting said end portion ofsaid first section with said side portion of said second section; meansfor connecting said guide arm, to the upper rollers so that the upperrollers are free to rotate with respect to said guide arm; said firstsection having two separate side arms spaced from and arranged inparallel relation to each other, each of said side arms being arrangedin substantially parallel relation to a vertical plane passingperpendicularly through the lower rollers of the drawingmechanism; across member connecting the ends of said side arms which are distantfrom said connected end of said first section; a fulcrum element mountedon said drawing mechanism and located in abutting engagement with acentral portion of said cross member, whereby said cross member and saidside arms connected thereto cooperate with said fulcrum element in themanner of a pendulum so as to automatically compensate for diiierencesin the lengths of said side arms; and means for limiting the movement ofsaid cross member and said side arms connected thereto about saidfulcrum element.

1. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upper rollers are arranged in pairs, comprising,in combination, a guide arm having at least a first section and a secondsection arranged substantially along a straight line with an end portionof said first section located adjacent to a side portion of said secondsection; joint means for articulatively connecting said end portion ofsaid first section with said sid portion of said second section; meansfor connecting said guide arm to the upper rollers so that the upperrollers are free to rotate with respect to said guide arm; said firstsection having two separate side arms spaced from and arranged inparallel relation to each other, each of said side arms being arrangedin substantially parallel relation to a vertical plane passingperpendicularly through the lower rollers of the drawing mechanism; across member pivotally connected to the ends of said side arms which aredistant from said connected end of said first section so that said sidearms may pivot in a vertical plane with respect to said cross member; afulcrum element mounted on said drawing mechanism and located inabutting engagement with a central portion of said cross member, wherebysaid cross member and said side arms connected thereto cooperate withsaid fulcrum element in the manner of a pendulum so as to automaticallycompensate for differences in the lengths of said side arms; and meansfor limiting the movement of said cross member and said side armsconnected thereto about said fulcrum element.

5. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upper rollers are arranged in pairs, comprising,in combination, a guide arm having at least a first section and a secondsection arranged substantially along a straight line with an end portionof said first section located adjacent to a side portion of said secondsection; joint means for articulatively connecting said end portion ofconnected to theends of said side arms which (are distant iromsaidconnected end of said-first :section so that said side arms .may vpivotin -a vertical plane with respect to said cross member; a.-fulcrumelement mounted on said drawing mechanism and located in abuttingengagement 'with a central portion .of said cross member, whereby saidcross member and said side arms connected thereto cooperate with saidfulcrum element in the imanner f a pendulum so as it automaticallycompensat for differences in the ilengths of saidside arms; and meansfor flim'it- ,ingthemovement of said cross member and said \sidearmsconnected thereto about said Ifulcrum element.

6. A device for guiding the upper rollers of a textile fiberdrawingmechanism in which the upperrollers are arranged in pairs,comprising, in combination, a guide arm having at least a first sectionand a second section arranged substantially along .a straight line .withan end por- .tion o'fsaid .first section located adjacent to a sideportion of said second section; joint means for articulativelyconnecting said .end portion of said 'first :section with said sideportion of said second section; means .for connecting said guide arm tothe upper rollers so that the upper rollers are 'free to rotate withrespect to said guide arm; said first section having two separate side:arms spaced from and arranged in parallel relationto each other, eachof said'side arms being arranged in substantially parallel relation to a"ertical plane passing perpendicularly through the lower rollers of the"drawing mechanism and said second section also being arranged insubstantially parallel relation to a vertical plane passingperpendicularly through the lower rollers of the drawing mechanism; across member pivotally connected to the ends of said side arms which aredistant from said connec't-ed end of said first section so that saids'id'e'arms may pivot in a vertical plane with respect to said :crossmember; a fulcrum element mounted -onssa id drawing mechanism andlocated in abutting engagement with "a central portion of said crossimember, whereby said :cro'ss member and said side arms connectedthereto cooperate with said :fulcrum element in the manner of a pendulum:so :as to automatically compensate for diffierences :in the lengthsofs'aid side arms; and means for limiting the movement of said crossmember and :said side arms connected thereto about :said fulcrumelement, said joint means for articulatively connecting said :guide :arm:sections to eac'h other comprising apair of end por tions locatedrespectively on .said side harms and each forming a substantially rightangle bend with the remainder of said side :armsaand :a pair of:recessesiormed .in said :side portion :of said seccnd sectinn and inwhich said zendpcrtions .of said sidearmsare received.

. l0 7. A :device for guiding the upper rollers of a textile -@fiberdrawing mechanism in which the upper rollers are arranged in pairs,comprising,

in combination, a guide arm having at least .a first section and asecond section arranged substantially along a straight line with an endportion of said :first section located adjacent. to a side portion ofsaid'second'section; joint means :for articulatively connecting said endportion of said first section with said side portion of said secondsection; means for connecting said guide :arm to the upper rollers sothat the upper rollers are free to rotate with respect to saidguide arm;said first section having two separate side arms spaced from andarrangedin parallel relation :to eachother, eachof said side arms being arranged:in substantially parallel relation to a vertical plane passingperpendicularly through the lower rollers of the drawing mechanism andsaidsecend section also being arranged in substantially;para1lel:relation:to-a vertical plane passing perpendicularly throughthe lower rollers of the drawing mechanism; a cross member pivotallyconnected to the ends of said side arms which 'are'distantfrom'saidconnected end-of said first section so that said side :arms may pivot ina vertical plane 'with respect to said cross memher; a fulcrumelementmounted on said :drawing mechanism and located in abuttingengagement with a central portion of said cross member, whereby saidcross member and said side arms :connected thereto cooperate with saidfulcrum element in the manner of :a pendulum so :as .to automaticallycompensate for differences zin-the lengths .of saidside arms; means forlimiting the movement of said :cross memberandsa id asid arms connectedthereto about said fulcrum :element; and :ashaft-on which the upperrollers nearest to :said joint means are rotatably -mount- :ed, saidjoint means comprising a pair of hookshaped end :portions formedrespectively at the ends of said side arms adjacent said side portion ofsaid second. section, th said hooked-shaped .end portionsembracingsaidshaft.

:8. A device foriguiding the upper :rollers of (a textile fiber drawingmechanism in which the upper rollers are arranged :in pairs, comprising,in combination, a guide arm having at least a first section and aisecondsection arrangedsubstantially along a straight .line with an endzportionof said first section located adjacent to a side portion .ofssaid secondsection; joint means tor-.articulatively connecting said end portion ofsaid first section with said side portion of said secondsection; meansfor connecting said guide arm 'to the'upper rollers so .that'the upperrollers are .free to rotate with'respect to said ,guide arm said firstsection having two separate side arm's spaced "from and arranged inparallel relation to each other, each of said-side arms being arrangedin substantially parallel relation to a vertical plane :passingperpendicularly through the lower :rollers of the drawing :mechanism andsaid second section also being arranged .in substantially :parallelrelation "to a vertical plane passing perpendicularly through the lowerrollers of the drawing mechanism; a cross member :pivotally connected:to the ends of said side arms which are distant .from .said connectedend of said first section so that said side arms may pivot a verticalplane with respect to said cross member; a .fulcru-m element mounted onsaid drawing mechanism and located .in abuttin engagement with acentralportion of said cross member, whereby "said cross member and :said

r ii

side arms connected thereto cooperate with said fulcrum element in themanner of a pendulum so as to automatically compensate for differencesin the lengths of said side arms; and means for lizniting the movementof said cross member and said side arms connected thereto about saidfulcrum element comprising a supporting member on which said fulcrumelement is located and a pair of longitudinal side portion mounted onsaid supporting member and located adjacent to but slightly spaced fromsaid side arms so as to provide a slight space for play of said sidearms before they contact said side portions.

9. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upper rollers are arranged in pairs, comprising,in combination, a guide arm having at least a first section and a secondsection arranged substantially along a straight line with an end portion of said first section located adjacent to a side portion of saidsecond section; joint means for articulativeiy connecting said endportion of said first section with said side portion of said secondsection; means for connecting said guide arm to the upper rollers sothat the upper rollers are free to rotate with respect to said guidearm; said first section having two separate side arms spaced from andarranged in parallel relation to each other, each of said side armsbeing arranged in substantially parallel relation to a vertical planepassing perpendicularly through the lower rollers of the drawingmechanism and said second section also being arranged in substantiallyparallel relation to a vertical plane passing perpendicularly throughthe lower rollers of the drawing mechanism; a cross member pivotallyconnected to the ends of said side arms which are distant from saidconnected end of said first section so that said side arms may pivot ina vertical plane with respect to said cross member; a fulcrum elementmounted on said drawing mechanism and located in abutting engagementwith a central portion of said cross member, whereby said cross memberand said side arms connected thereto cooperate with said fulcrum elementin th manner of a pendulum so as to automatically compensate fordifierences in the lengths of said side arms; means for limiting themovement of said cross member and said side arms connected thereto aboutsaid fulcrum element; and a shaft on which the upper rollers nearest tosaid joint means are rtatably mounted, said joint means comprising apair of hook-shaped end portions formed respectively at the ends of saidside arms adjacent said side portion of said second section, the saidhookshaped end portions embracing said shaft, said means for connectingsaid guide arm to said upper rollers comprising a hollow saddle membermountde on said second section of said guide arm and having dependingportions which embrace said shaft, said hook-shaped end portions of saidside arms being located within said depending portions of said saddlemember.

19. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upper rollers are arranged in pairs, comprising,in combination, a guide arm having at least a first section and a secondsection arranged sub-' stantially along a straight line with an endportion of said first section located adjacent to a side portion of saidsecond section; joint means for articulatively connecting said endportion of said first section with said side portion of said secondsection: means for connecting said guide arm to the upper rollers sothat the upper rollers are free to rotate with respect to said guidearm; said first section having two separate side arms spaced from andarranged in parallel relation to each other, each of said side armsbeing arranged in substantially parallel relation to a vertical planepassing perpendicularly through the lower rollers of the drawingmechanism and said second section also being arranged in substantiallyparallel relation to a vertical plane passing perpendicularly throughthe lower rollers of the drawing mechanism; a cross member pivotallyconnected to the ends of said side arms which are distant from saidconnected end of said first section so that said side arms may pivot ina vertical plane with respect to said cross member; a fulcrum elementmounted on said drawing mechanism and located in abutting engagementwith a central portion of said cross member, whereby said cross memberand said side arms connected thereto cooperate with said fulcrum elementin the manner of a pendulum so as to automatically compensate fordifferences in the lengths of said side arms; means for limiting themovement of said cross member and said side arms connected thereto aboutsaid fulcrum element; and a shaft on which the upper rollers nearest tosaid joint means are rotatably mounted, said joint means comprising apair of hook-shaped end portions formed respectively at the ends of saidside arms adjacent said side portion of said second section, the saidhookshaped end portions embracing said shaft, said means for connectingsaid guide arm to said upper rollers comprising a hollow saddle membermounted on said second section of said guide arm and having dependingportions which embrace said shaft, said hoolr-shaped end portions ofsaid side arms being located within said depending portions of saidsaddle member; and means for limiting the movement of said first sectionwith respect to said second section comprising a spring mounted betweensaid side arms so as to push the hook-shaped end portions thereofagainst said depending portions of said saddle member.

11. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upper rollers are arranged in pairs, comprising,in combination, a guide arm having at least a first section and a secondsection arranged substantially along a straight line with an end portionof said first section located adjacent to a side portion of said secondsection; joint means for articulatively connecting said end portion ofsaid first section with said side portion of said second section; meansfor connecting said guide arm to the upper rollers so that the upperrollers are free to rotate with respect to said guide arm; said firstsection having two separate side arms spaced from and arranged inparallel relation to each other, each of saidL side arms being arrangedin substantially parallel relation to a vertical plane passingperpendicularly through the lower rollers of the drawing mechanism andsaid second section also being arranged in substantially parallelrelation to a Vertical plane passing perpendicularly through the lowerrollers of the drawing mechanism; a cross member pivotally connected tothe ends of said side arms which are distant from said connected end ofsaid first section so that said side arms may pivot in a vertical planewith respect to said cross member; a fulcrum element mounted on saiddrawing mechanism and sne'mber and said side iarms connected theretocooperate awith said fulcrum .elementfin the :manneriof a pendulum so asto automatically compensate if or differencesi-n the lengths eof saidside arms; and ,-.a shaft .on which dzhe upper rollers neares't to :saidjoint means are 'rotatablyrmount- "ed, said \joint means comprising a:pair of hookshaped end :portions sformed respectively at :the ends ofsaid side arms adjacent said side por tion of said second section, the:said hook-shaped end portions embracing said shaft, said :meansforcon-necting said guide arm to said upper rollers comprising a hollowsaddle .member mounted onsaidsecondsection ofsaidiguidearmand havingdepending portions which embracesaidishaft, --said hook-shaped endportions of said side arms being located within said depending .portionsof said saddle member; and means for limiting the movement of said firstsection :with respect to said second section comprising a springimountedloetween said side arms so as to push :the hookshapedend portionsthereof against saidv'dependeing portions of said saddle member, saidcross member fleeing formed with an aperture extend- 'ing therethroughin a direction which is substantially perpendicular to said side arms,said fulcrum element comprising a fixedly mounted :pin extending throughsaid aperture, and a projection -mounted on said cross member andbear-*i-ngagainstthe outer "surface of-said pin and said being ofasubstantia'lly smaller cross-section than said aperture so that a spaceis provided between the Outer surface of said pin and :the

surface of said-aperture, whereby the movement of said cross member andsaid side arms connectedthereto about said pin is limited to said spacebetween said pin and said aperture.

'12. A device "for guiding the upper :rollers-o'fa textile fiber drawingmechanism in which the upper :rollers are arranged in pairs, comprising,in "combination, a guide arm having at least a first section and asecond section arranged substantially along a straight line with'an-endportion of said first section located adjacent-to a side por- "tionofsaidsecond section; joint means for articulatively connecting said endportion of said first section with said side portion-of said secondsection; means for connecting said guide arm to the upper rollers-sothatthe upper rollers are free to'rotate with respect to said-guide arm;said first section having two separate side arms spaced from andarranged in parallel relation to each other, each :of said side armsbeing arranged in relation to a vertical "plane passing perpendicularlythrough the lower rollers of the drawing mechanism; a cross memberpivotally connected to the ends of said side arms which are distant fromsaid connected end of said first section so that said-side arms maypivot in a vertical plane with-respect to saidcross member; afulcrum-element mounted on said drawing mechanism and located inabutting engagement with a central portion of said cross member, wherebysaid cross member and said side arms connected thereto cooperate withsaid fulcrum element in the mannor of a pendulum so as to automaticallycornpensate for diiferences the lengths of said side arms; and #a shafton which the upper rollers nearest to said ioint means are '-rotatablymount- -ed, said joint :means comprising :a pair of hookshaped. endportions form-ed respectiuely zat ithe ends of :said side :arms adjacentsaid side portion of said second section,;thesaidrhookeshaped endportions embracing said shaft, said means :for connecting said guide arm:to said :upper mailers comprising ;a hollow saddle member mounted :onsaid section section of said guide :arm :and having depending .gportionswhich embrace rsaicl shaft, said hook-shaped end :portions -of said:side :anms being located within said depending :portions said saddlemember; means for limiting sthe movement of said first section withrespect do said second section comprising :asspring mounted betweentsaidside arms :so as to :pushthookshaped end portions thereof against saiddepending portions of said saddle member, said cross 'memberibeingformed with an raperture ex tending therethrough in .a directionwhich'fis substantially perpendicular tosaidsidearmsesaiid fulcrumelement :comprising a fixedly mounted pin extending through saidaperture, :andramrojection mounted 101']. said cross member and hearingagainst the-outer surface of said pin and said :p'in fbeing of :asubstantiallyrsmaller cross-section than-said aperture so that aspace isprovidedbetween the outer surface .of said pin and the :sun- :face'oisaid aperture, whereby the :mo-vemen't or said cross member-and saidside :arms :connected thereto about :said :pin is limited to saidspace:be-

tween said pin and said :aper-ture; :a slot formed in said drawingmechanism .iniwhich said ipill 'is received; and means for a'djustablyfixingsa'id pin at any desired location in said slot "whereby theposition of said upper rollers may be regulated.

13. A :device for guiding the upper rollers-01 a textilefibendrawing'mec'hanism in which theupper rollers are arranged in pairs,comprising. in combination, a guide arm :naving at least 'a filstsection :and a second section arranged "substan tially along a straightdine with an end portion of said first section "located adjacent to aside portion :of said second section; do'int means forarticulatively=connecting said end portion :of said first section 'withsaid side portion :of said second section; 'means ior connecting saidguide arm 'to the upper rollers so that the upper rollers are free torotate with respect to said guide arm; first section having two separateside arms spaced from and arranged in parallel relation to each other,each of said side earms being arrangcdin substantially parallel relationto a vertica-l plane passing perpendicularly through the lower rollers"of the "drawing mechanism and said second =section also being 1arranged in substantially parallel relation a vertical plane passingperpendicularly through the lower irollers pf the drawing mechanism; {across member pivotally connected to the'ends of said side arms which aredistant from said connected end of said first --section so that saidside arms may pivo't in a vertical plane with respect to s aid pressmember; 'a fulcrum element mounted-on said drawing mechanism and locatedin abutting engagement with a central 7 portion of said cross member,whereby said cross member and said side arms connected thereto cooperatewith said idlcruzmlement in the manner of a pendulum so as toautomaticallycon'lpensate for differences in the lengths of said sidearms; and a shat-t on which tho-upper rollers nearest to said jointmeans are rotatably mounted, said joint ,means comprising-a pair ofhook-shaped end portions formed respectively the :ends of said side armsadiacen-t said side portion "of said second section, the saidhook-shaped end "portions embracing said shaft, said means forconnecting said guide arm to said upper rollers comprising a hollowsaddle member mounted on said second section of said guide arm andhaving depending portions which embrace said shaft, said hook-shaped endportions of said side arms being located within said depending portionsof said saddle member; and means for limiting the movement of said firstsection with respect to said second section comprising a spring mountedbetween said side arms so as to push the hook-shaped end portionsthereof against said depending portions of said saddle member, saidcross member bein formed with an aperture extending therethrough in adirection which is substantially perpendicular to said side arms, saidfulcrum element comprising a fixedly mounted pin extending through saidaperture, and a projection mounted on said cross member and bearingagainst the outer surface of said pin and said pin being of asubstantially smaller cross-section than said aperture so that a spaceis provided between the outer surface of said pin and the surface ofsaid aperture, whereby the movement of said cross member and said sidearms connected thereto about pin is limited to said space between saidpin and said aperture and whereby said side arms are free to rotate withsaid cross member about the axis of said pin so that, when saidhook-shaped end portions of said side arms are disconnected from saidupper roller shaft, said side arms may be turned up to give access torollers located beneath said side arms.

14. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upper rollers are arranged in pairs, comprising,in combination, a guide arm having at least a first section and a secondsection arranged substantially along a straight line with an end portionof said first section located adjacent to a side portion of said secondsection; joint means for articulatively connecting said end portion ofsaid first section with said side portion of said second section; meansfor connecting said guide arm to the upper rollers so that the upperrollers are free to rotate with respect to said guide arm; said firstsection having two separate side arms spaced from and arranged inparallel relation to each other, each of said side armsbeing arranged insubstantially parallel relation to a vertical plane passingperpendicularly through the lower rollers of the drawing mechanism andsaid second section also being arranged in substantially parallelrelation to a vertical plane passing perpendicularly through the lowerrollers of the drawing mechanism; a cross member pivotally connected tothe ends of said side arms which are distant from said connected end ofsaid first section so that said side arms may pivot in a vertical planewith respect to said cross member; a fulcrum element mounted on saiddrawing mechanism and located in abutting engagement with a centralportion of said cross member, whereby said cross member and said sidearms connected thereto cooperate with said fulcrum element in the mannerof a pendulum so as to automatically compensate for differences in thelengths of said side arms; and a shaft on which the upper rollersnearest to said joint means are rotatably mounted, said joint meanscomprising a pair of hook-shaped end portions formed respectively at theends ofsaid side arms adjacent said side portion of said second section,the said hook-shaped end portions embracing said shaft, said means forconnecting said guide arm to said upper rollers comprising a hollowsaddle member mounted on said second section of said guide arm andhaving depending portions which embrace said shaft, said hookshaped endportions of said side arms being located within said depending portionsof said saddle member; and means for limiting the movement of said firstsection with respect to said second section comprising a spring mountedbetween said side arms so as to push the hookshaped end portions thereofagainst said depending portions of said saddle member, said cross memberhaving an annular projection located centrally thereof, said fulcrumelement having a substantially planar surface against which said annularprojection bears and which is slightly spaced from the cross member, sothat the movement of said cross member and said side arms connectedthereto about said fulcrum element is limited by the contact of aportion of said cross member with said surface of said fulcrum element.

15. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upper rollers are arranged in pairs, comprising,in combination, a guide arm having at least a first section and a secondsection arranged substantially along a straight line with an end portionof said first section located adjacent to a side portion of said secondsection; joint means for articulatively connecting said end portion ofsaid first section with said side portion of said second section; meansfor connecting said guide arm to the upper rollers so that the upperrollers are free to rotate with respect to said guide said first sectionhaving two separate side arms spaced from and arranged in parallelrelation to each other, each of said side arms being arranged insubstantially parallel relation to a vertical plane passingperpendicularly through the lower rollers of the drawing mechanism andsaid second section also being arranged in substantially parallelrelation to a vertical plane passing perpendicularly through the lowerrollers of the drawing mechanism; a cross member pivotally connected tothe ends of said side arms which are distant from said connected end ofsaid first section so that said side arms may pivot in a vertical planewith respect to said cross member; a fulcrum element mounted on saiddrawing mechanism and located in abutting engagement with a centralportion of said cross member, whereby said cross member and said sidearms connected thereto cooperate with said fulcrum element in the mannerof a pendulum so as to automatically compensate for differences in thelengths of said side arms; and a shaft on which the upper rollersnearest to said joint means are rotatably mounted, said joint meanscomprising a pair of hook-shaped end portions formed respectively at theends of said side arms adjacent said side portion of said secondsection, the said hook-shaped end portions embracing said shaft, saidmeans for connecting said guide arm to said upper rollers comprising ahollow saddle member mounted on said second section of said guide armand having depending portions which embrace said shaft, said hookshapedend portions of said side arms being located within said dependingportions of said saddle member, said side arms each having a projectionon the surface thereof and said saddle member having a pair ofprojections in engagement with said projections of said side arms so asto limit the rotation of said saddle mem- 17 her about said shaft; andmeans for limiting the movement of said first section with respect tosaid second section comprising a'spring mounted between said side armsso as to push the'hookshaped end portions thereof against said dependingportions of said saddle member, said cross member having an annularprojection located centrally thereof, said fulcrum element having asubstantially planar surface against which said annular projection bearsand which isslightly spaced from the cross member, so that the movementof said cross'member and said side arms connected thereto about saidfulcrum element is limited by the contact of a portion of said crossmember with said surface of said fulcrum element.

16. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upper rollers are arranged in pairs, comprising,

in combination, a guide arm having at least a I first section and asecond section arranged substantially along a straight line with an endportion of said first section located adjacent to a side portion of saidsecond section; joint means for articulatively connecting said endportion of said first section with said side portion of said secondsection; means for connecting said guide arm to the upper rollers sothat the upper rollers are free to rotate with respect to said guidearm; said first section having two separate side arms spaced from andarranged in parallel relation to each other; a cross member connectingthe ends of said side arms which are distant from said connected end ofsaid first section; and a fulcrum element comprising a pin which issupported in a substantially vertical position and which is mounted onsaid drawing mechanism and located in abutting engagement with a centralportion of said cross member, whereby said cross member and said sidearms connected thereto cooperate with said fulcrum element in the mannerof a pendulum so as to automatically compensate for differences in thelengths of said side arms.

17. A device for guiding the upper rollers of a textile fiber drawingmechanism in which tne upper rollers are arranged in pairs, comprising,in combination, a guide arm having at least a first section and a secondsection arranged substantially along a straight line with an end por- 18tion of said first section located adjacent to a side portion of saidsecond section; joint means for articulatively connecting said endportion of said first section with said side portion of said secondsection; means for connecting said guide arm to the upper rollers sothat the upper rollers are free to rotate with respect to said guidearm; said first section having two separate side arms spaced from andarranged in parallel relation to each other, each of said side armsbeing arranged in substantially parallel relation to a vertical planepassing perpendicularly through the lower rollers of the drawingmechanism and said second section also being arranged in substantiallyparallel relation to a vertical plane passing perpendicularly throughthe lower rollers of the drawing mechanism; a cross member pivotallyconnected to the ends of said side arms which are distant from saidconnected" end of said first section so that said side arms may pivot ina vertical plane with respect to said cross member; a fulcrum elementcomprising a pin which is supported in a substantially vertical positionand which is mounted on said drawing mechanism and located in abuttingengagement with a central portion of said cross member, whereby saidcross member and said side arms connected thereto cooperate with saidfulcrum element in the manner of a pendulum so as to automaticallycompensate for differences in the lengths of said side arms; and meansfor limiting the movement of said cross member and said side armsconnected thereto about said i'ulcrum element comprising a supportingmember on which said fulcrum element is located and a pair oflongitudinal side portions mounted on said supporting member and locatedadjacent to but slightly spaced from said side arms so as to provide aslight space for play of said side arms before they contact said sideportions.

WILHELM STAHLECKER.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 2,108,930 Stroink Feb. 22, 1938 2,246,474 Stahlecker June 17,1941 2,326,979 Stahlecker Aug. 17, 1943

